Delta E* colour difference

Add to quotation cart

Assessment of colour is more than a numeric expression. Usually it's an assessment of the colour difference (delta) from a known standard. CIELAB (L*a*b*) and CIELAB (L*C*h) are used to compare the colours of two objects.

The expressions for these colour differences are DL*, Da*, Db*, or DL* DC* DH* ("D" symbolises "delta," which indicates difference).

Note: DH* is usually used instead of Dh to enable DE* to be calculated.

DH* = 2(C 1 *.C 0 *) 1/2 sin (Dh/2)

Where C0* & C1* are chromaticities of the colours being compared and Dh is in the range +180°. (If Dh is outside this range then 360° is added or /subtracted to bring it inside.)

Given DL*, Da* and Db*, or DL*, DC* and DH* the total difference or distance on the CIELAB diagram can be stated as a single value, known as DE*.

DE*ab = [(DL) 2 + (Da) 2 + (Db) 2 ] 1/2

DE*ab = [DE*) 2 + (DC*) 2 + (DH*) 2 ] 1/2

thus...

DL* = difference in lightness/darkness value (+ = lighter - = darker)
Da* = difference on red/green axis (+ = redder - = greener)
Db* = difference on yellow/blue axis (+ = yellower - = bluer)
DC* = difference in chroma (+ = brighter - = duller)
DH* = difference in hue
DE* = total colour difference value

Note: CIE stands for Commission Internationale de l´Eclairage (The International Commission on Illumination)

Applications

  • Chemicals
  • Coatings
  • Edible Oils and Fats
  • Food and Beverage
  • Household Products
  • Petroleum Oils and Waxes
  • Pharmaceuticals and Cosmetics
  • Plastics
  • Sugar Solutions, Syrups and Honey
  • Textiles
Title Application Part Number Add to quotation cart
OnColor Lite Chemicals | Coatings | Household Products | Plastics | Textiles 400590
OnColor Premium Chemicals | Coatings | Household Products | Plastics | Textiles 400610
PFXi-195/1 Chemicals | Coatings | Household Products | Petroleum Oils and Waxes 1371951
PFXi-195/2 Petroleum Oils and Waxes 1371952
PFXi-195/3 Edible Oils and Fats | Food and Beverage 1371953
PFXi-195/4 Beer, Malts and Caramels | Food and Beverage 1371954
PFXi-195/5 Household Products | Medical and Clinical Products | Pharmaceuticals and Cosmetics 1371955
PFXi-195/6 Chemicals | Household Products 1371956
PFXi-195/7 Sugar Solutions, Syrups and Honey 1371957
PFXi-195/8 Waste Water Treatment 1371958
PFXi-195/9 Beer, Malts and Caramels | Chemicals | Coatings | Edible Oils and Fats | Food and Beverage | Household Products | Medical and Clinical Products | Petroleum Oils and Waxes | Pharmaceuticals and Cosmetics | Plastics | Sugar Solutions, Syrups and Honey 1371959
PFXi-880/AT Edible Oils and Fats 1378802
PFXi-880/CIE Beer, Malts and Caramels | Chemicals | Coatings | Edible Oils and Fats | Food and Beverage | Household Products | Medical and Clinical Products | Petroleum Oils and Waxes | Pharmaceuticals and Cosmetics | Plastics | Sugar Solutions, Syrups and Honey | Waste Water Treatment 1378806
PFXi-880/L Edible Oils and Fats 1378801
PFXi-880/P Petroleum Oils and Waxes 1378803
PFXi-880/S Sugar Solutions, Syrups and Honey 1378805
PFXi-950 Chemicals | Edible Oils and Fats 1379501
PFXi-950/P Petroleum Oils and Waxes 1379502
PFXi-995 Chemicals | Edible Oils and Fats | Food and Beverage | Household Products | Petroleum Oils and Waxes 1379951
PFXi-995/P Petroleum Oils and Waxes 1379952
TR 500 Spectrophotometer (1x3 mm Aperture) Coatings | Household Products | Plastics | Textiles 403042
TR 500 Spectrophotometer (1x8mm Aperture) Coatings | Household Products | Plastics | Textiles 403040
TR 500 Spectrophotometer (4 mm Aperture) Coatings | Household Products | Plastics | Textiles 403041
TR 520 Spectrophotometer Coatings | Household Products | Plastics | Textiles 403035
TRA 500 Handheld & Benchtop Reflectance Spectrophotometer Coatings | Household Products | Plastics | Textiles 403220
TRA 520 Handheld & Benchtop Sphere Spectrophotometer Coatings | Household Products | Plastics | Textiles 403225